Special Issue on Discovery Science (Springer Machine Learning journal) ****** Apologize for multiple posting ****** Due to multiple requests, we extended deadlines as follows -Paper submission: March, 1 2021 -First notifications: May, 12 2021 -Deadline for revised submissions: June, 17 2021 -Second round of notifications: August, 19 2021 -Expected publication: November 2021 (online) Details on the call for paper and the submission procedure can be found at https://ds2020.csd.auth.gr/special-issue/ ********************************** Guest editors ********************************** Annalisa Appice, University of Bari Aldo Moro, Italy Grigorios Tsoumakas, Aristotle University of Thessaloniki, Greece For Queries relating to Journal Track Submissions email the journal track chairs at annalisa.appice@uniba.it and greg@csd.auth.gr